Test of the stability of two-dimensional Taylor-Couette flow

二维Taylor-Couette流稳定性检验

• 批准号: 19K14895
• 负责人: Cerbus Rory
• 金额: $ 1.66万
• 依托单位: Okinawa Institute of Science and Technology Graduate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2019
• 资助国家: 日本
• 起止时间: 2019-04-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-19K14895/
• 关键词: 乱流遷移; ２次元乱流; Turbulence Transition; 2D turbulence

The principal investigator has placed this project on temporary hold due to leaving for a temporary position abroad. Up until that time, a number of different 2D Couette geometries were constructed, to be able to explore a wide range of Reynolds numbers (equivalently, Taylor numbers) to test for stability of the flow. In addition to smooth walls, rough walls were also constructed. For the smooth cases tested, the flow is stable. In addition, experiments (soap film) and simulations (OpenFOAM) of 2D channel flow were performed to investigate the stability of that flow and to compare with the 3D case. As observed in other studies, a peculiar traveling wave, reminiscent of a snake, emerges. The Reynolds number dependence of the wavelength was investigated experimentally and numerically.

首席研究员因出国临时任职而暂时搁置了该项目。直到那时，人们构建了许多不同的二维库埃特几何形状，以便能够探索各种雷诺数（相当于泰勒数）来测试流动的稳定性。除了光滑的墙壁之外，还建造了粗糙的墙壁。对于测试的平滑情况，流量是稳定的。此外，还进行了 2D 通道流的实验（肥皂膜）和模拟 (OpenFOAM)，以研究该流的稳定性并与 3D 情况进行比较。正如在其他研究中观察到的那样，出现了一种奇怪的行波，让人想起蛇。通过实验和数值研究了波长的雷诺数依赖性。